Electricity-gas comprehensive energy system unified energy flow calculation method considering natural gas thermodynamic process

An integrated energy system and thermal process technology, applied in computing, electrical digital data processing, instruments, etc., can solve problems such as not being considered, temperature rise of outlet nodes, and inapplicability

Active Publication Date: 2019-05-10
CHONGQING UNIV
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Problems solved by technology

[0004] The pipeline flow model in the partial differential form is not suitable for the unified energy flow solution of the electric-gas integrated energy system because it covers a large amount of unnecessary state variable information in the pipeline, which brings a huge amount of calculation
In addition, as another important equipment of the natural gas system, the thermodynamic process of the compressor will lead to a significant temperature rise of the outlet node, and this characteristic has not been considered in the existing unified energy flow solution method of the electric-gas integrated energy system

Method used

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  • Electricity-gas comprehensive energy system unified energy flow calculation method considering natural gas thermodynamic process
  • Electricity-gas comprehensive energy system unified energy flow calculation method considering natural gas thermodynamic process
  • Electricity-gas comprehensive energy system unified energy flow calculation method considering natural gas thermodynamic process

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Embodiment 1

[0069] The unified energy flow calculation method of electricity-gas integrated energy system considering the thermal process of natural gas mainly includes the following steps:

[0070] 1) Establish an equipment model considering the thermal process of the natural gas system. The equipment model includes a natural gas pipeline model and a compressor model.

[0071] The natural gas pipeline model includes a natural gas pipeline thermal model and a natural gas pipeline flow model. The compressor model includes a compressor thermal model and a compressor flow model.

[0072] 1.1) The main steps to establish a natural gas pipeline model are as follows:

[0073] 1.1.1) Natural gas horizontal pipeline m 1 no 1 The gas flow conservation (mass conservation, momentum conservation, energy conservation) equation of the gas flow is as follows:

[0074]

[0075] Among them, p and T are the pressure and temperature of natural gas, respectively. Z and R are the compressibility fact...

Embodiment 2

[0132] An experiment to verify the unified energy flow calculation method of the electricity-gas integrated energy system considering the thermal process of natural gas mainly includes the following steps:

[0133] 1) Build as figure 1 The test system shown.

[0134] Taking the IEEE14-NGS13 system, that is, the IEEE14-node system and the 13-node natural gas system, as an example, the unified energy flow calculation method of the electric-gas integrated energy system considering the thermal process of pipelines and compressors proposed by the present invention is tested. The 13-node natural gas system includes 2 gas sources, 3 common loads, 9 pipelines, 3 compressors and 2 gas turbines. Among them, all compressors are driven by natural gas. The two gas turbines are respectively connected to node 1 (balanced node) of the power system and node 8 of the natural gas system, as well as node 3 of the power system and node 6 of the natural gas system. Its schematic diagram is as fo...

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Abstract

The invention discloses an electricity-gas comprehensive energy system unified energy flow calculation method considering natural gas thermodynamic process. The method mainly comprises the following steps: 1) establishing an equipment model considering a natural gas system thermodynamic process; wherein the equipment model comprises a natural gas pipeline model and a compressor model. 2) based onthe equipment model, establishing electricity-; the invention discloses a unified energy flow solving model of a gas comprehensive energy system. The unified energy flow solving model of the electricity-gas comprehensive energy system comprises a natural gas system model, a power system model and a coupling element model. And 3) calculating the energy flow of the electric-gas integrated energy system to be detected by using the unified energy flow solving model of the electric-gas integrated energy system. The method can reflect the temperature change condition of the natural gas caused by thethermodynamic process and the influence of the temperature change condition on other state variables in the system more accurately.

Description

technical field [0001] The invention relates to the field of electricity-gas integrated energy systems, in particular to a unified energy flow calculation method for electricity-gas integrated energy systems considering the thermal process of natural gas. Background technique [0002] In recent years, with the increasing installed capacity of gas turbines, the coupling between the power system and the natural gas system has become increasingly tight. Therefore, it is very important to solve the unified energy flow of the electricity-gas integrated energy system. The thermal process of natural gas passing through different components will lead to continuous changes in temperature, and the changes in variables such as temperature, air pressure and flow are mutually affected and coupled. The natural gas temperature has an important impact on both the power system and the natural gas system, for example, it affects the energy consumption of the compressor and the energy conversi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 余娟包诗媛杨知方代伟郭林马梦楠覃明星
Owner CHONGQING UNIV
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